National Weather Service Weather Forecast Office

• Home
• Site Map
• News
• Organization
• Search for: NWS All NOAA 

399
FXUS64 KEWX 222311
AFDEWX

Area Forecast Discussion
National Weather Service Austin/San Antonio TX
611 PM CDT Thu Aug 22 2019

.UPDATE...
Isolated showers have developed further inland, now into portions of
the eastern Hill Country and I-35 corridor. Have updated to include a
mention of isolated showers through sunset near and east of a
Fredericksburg to Hondo to Pearsall line. Can`t rule out an isolated
thunderstorms or two.

&&

.PREV DISCUSSION... /ISSUED 256 PM CDT Thu Aug 22 2019/

SHORT TERM (Tonight through Friday Night)...
A few showers are lifting into the Coastal Plains this afternoon as
the sea breeze continues to push inland. Visible satellite imagery
shows much less vertical extent to the cumulus field than this time
yesterday as a weakness in the mid-level height field continues to
translate west of the region. While an isolated shower or two cannot
be ruled out east of Interstate 35 through the early evening hours,
expect much lower shower coverage than yesterday. Loss of daytime
heating will result in convection waning with another dry night
expected as nocturnal stratus redevelops and keeps overnight lows in
the mid to upper 70s.

Afternoon water vapor imagery shows an inverted trough lifting up
the eastern Mexico coast and as this feature reaches the northwest
Gulf on Friday, expect scattered to numerous thunderstorms to develop
along the sea breeze mid-morning through the afternoon. This,
combined with slightly more cloud cover as convective temperatures
are reached, should help moderate temperatures a few degrees on
Friday with highs in the mid 90s to near 100. Will have to watch
progress of an outflow boundary stretching from the Low Rolling
Plains of Texas to the Red River for any southward progress overnight
and during the day Friday as it may serve as a focus for
thunderstorm activity over parts of the Hill Country by Friday
evening. Regardless, forecast soundings from near San Angelo indicate
convective temperatures will easily be met tomorrow afternoon with
little to no capping in place and even if the boundary does not make
it south, a few thunderstorms will be possible across the western
Hill Country during to just after peak heating. Have added low (20
percent) rain chances to the western Hill Country to account for
this. Loss of heating will again make Friday night dry for the region
with lows in the mid 70s to low 80s.

LONG TERM (Saturday through Thursday)...
With the disturbance lingering over the northwest Gulf on Saturday
and a shortwave trough crossing the Southern Plains on Saturday and
Sunday, isolated to scattered showers and thunderstorms will again be
possible across the Hill Country, Central Texas, and into the Coastal
Plains during peak heating. Highs in the mid 90s to near 100 this
weekend will climb into the upper 90s to low 100s on Monday as upper
ridging builds back across the region from the west. Monday appears
to be one of the hotter days in the forecast period and will need to
be monitored for potential Heat Advisories. Dry and hot conditions
are expected to persist through Thursday as ridging spreads farther
across the region.

&&

.PRELIMINARY POINT TEMPS/POPS...
Austin Camp Mabry              77 100  76  99  77 /  10  10  10  20  10
Austin Bergstrom Intl Airport  74  98  74  96  76 /  10  20  10  20  10
New Braunfels Muni Airport     75  98  74  98  75 /  10  20  10  10  10
Burnet Muni Airport            75  96  75  96  75 /  10  10  10  20  10
Del Rio Intl Airport           78 100  80  99  78 /  10  10  10  10  10
Georgetown Muni Airport        76  97  76  96  76 /  10  10  10  20  10
Hondo Muni Airport             75  99  76  99  76 /  10  10  10  10  10
San Marcos Muni Airport        75  97  75  97  76 /  10  20  10  10  10
La Grange - Fayette Regional   76  96  76  97  77 /  20  30  10  20  10
San Antonio Intl Airport       78  97  78  98  78 /  10  10  10  10  10
Stinson Muni Airport           77  99  78  98  78 /  10  10  10  10  10

&&

.EWX WATCHES/WARNINGS/ADVISORIES...
None.
&&

$$

Aviation...BMW
Short-Term/Long-Term...Runyen